DC electrical grid for boats and for offshore installations, with increased safety disconnection

摘要

Electric current network (1) for boats underwater navigation or surface, and for offshore installations, which has a safety disconnection increased with at least one current source (2), particularly a battery and / or installation of fuel cells, at least one electric consumer (3), for example, an electric drive motor or board network and at least one disconnecting device (4) for disconnecting a DC flowing in the DC network (1), wherein the disconnecting device (4) has a vacuum switch (5) connected to the network, and a switching device (8 or 9) by which it can extinguish an arc generated during opening of the switch (5), characterized in that the vacuum switch (5) has a first commutating pole (5a) and a second commutating pole (5b), wherein the first pole commutation ng (5a) is connected to a current shunt (6) from a positive pole of the current source (2) to the consumer (3), and second commutating pole (5b) is connected to a bypass current (7) from a negative pole of the direct current source (2) to the consumer (3), wherein both switching poles (5a, 5b) are coupled together mechanically, and wherein the device off (4) for at least one of the two commutating poles (5a, 5b) has a switching device (8 or 9) for extinguishing an arc generated on the commutating mentioned (5a or 5b ).